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아스파라거스 지상부 친경 제거시기가 익년도 수량에 미치는 영향
손동모,김효중,정종모,김성준,김병삼,윤봉기,이정현 全南大學校 農業科學技術硏究所 2016 農業科學技術硏究 Vol.53 No.-
This study was conducted to investigate the effect of the mother stem removal period on the above-ground part of the asparagus stem in the non-heated greenhouse of Jeonnam Agricultural Research & Extension Service on the quantity of spear in the following year. For the test variety, ‘Super Welcome’ (Sakata, Japan) was notified, and for the removal period of the mother stem on the above-ground part of the stem, it was set as green leaf period, yellow leaf period and dead leaf period according to the change in the stem & leaf color to be treated. As a result of comparing the average temperature for 15 days before removing the stem & leaf that just came up, the temperature was lower when the sulfuration level was more severe and the removal period was more delayed. Especially, the dead leaves that were removed in late December showed minimum temperature of 0.9℃ and daily average temperature of 7.2℃ to be 3.5℃ lower than the yellow leaf period (10.7℃). For the initial harvesting date for each treatment, the yellow leaf period and the dead leaf period were February 17, 2015 to be 5 days earlier than February 22 of the green leaf period. As for the number of harvesting days, the green leaf period was 175 days, and the yellow leaf period and the dead leaf period were 180 days to have 5 days difference, but the harvesting frequency was 87~88 times for all three periods to have no difference between the treatments. In the growth & development of the mother stem of above-ground stem for each treatment, the plant height and the number of stems were 190㎝ and 8.0EA in the dead leaf period to be the longest and highest in number, and the stem diameter was 15.3mm in the yellow leaf period to be the thickest. For the characteristics of the harvesting spear for each above-ground removal period, the number of spear per week was 42.8EA in the green leaf period, 44.8EA in the yellow leaf period, and 44.9EA in the dead leaf period. For the spear diameter, the thickest was 16.2mm in the dead leaf period, followed by 15.9mm in the green leaf period, and 15.7mm in the yellow leaf period. As for the average spear weight per 1EA, the dead leaf period showed 30.2g to have the most weight, followed by 28.4g in the yellow leaf period, and 28.0g in the green leaf period. For the quantity of spear per 10a for each treatment, the dead leaf period showed 1,510kg to have 7% increase compared to 1,399kg in the yellow leaf period, but in the green leaf period where the current of nutrients from the stem was not enabled appropriately, it decreased 6% to 1,331kg. As seen in the results shown above, it is considered that removing the stem in the period between the yellow leaf and the dead leaf, where the nutrients from above-ground are completely flowed to the underground stumps by the decrease in temperature without disease and insect pest is favorable in the nutrient management when harvesting in long-term in spring and summer at Jeonnam region on the following year.